S 550 (221.171) V8-5.5L (273.961) (2007)
Head Restraint Release Solenoid: Service and Repair
Resetting triggered NECK-PRO head restraint
If the NECK-PRO head restraints are triggered in an accident, you must reset the head restraints on the driver's and front-passengers seat. If you do
not, the additional protection will not be available in the event of anther rear-end collision. You can recognize when head restraints have been
triggered by the fact they have been moved forwards and can no longer be adjusted.
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Take resetting tool (1) out of glove compartment.
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Insert resetting tool (1) into guide (3), between the head restraint cushion and the rear head restraint cover.
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Press resetting tool (1) downwards until you hear the head restraint deployment mechanism lock.
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Pull out resetting tool (1).
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Firmly press back head restraint cushion (2) until it engages.
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Repeat this procedure for the second head restraint.
If you have problems resetting the head restraints, have this work carried out at a qualified specialist workshop, e.g. a Mercedes-Benz Service Center.
For Safety reasons, have NECK-PRO head restraints checked at a qualified specialist workshop, e.g. a Mercedes-Benz Service Center, following a rear
collision.